Dissertations / Theses: 'Subjective control system design'

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Owens, T. J. "Robust control system design]." Thesis, University of Strathclyde, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381724.

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Yang, Sun. "Solar Energy Control System Design." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-141489.

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This thesis covers design, simulation and implementation of a solar energy control system for an on grid energy storage device. The design covers several control methods such as energy balance control, operating mode switching and data exchange. A genetic algorithm was designed to optimize the control system parameters design, and the algorithm's simulation and real time operating system implementation showed comparable results. The control system was implemented to connect a power supply to the grid. The power supply simulated a solar panel and connected to an electrical grid via Energy Hub equipment, and the energy transfer characteristics of designed control system were tested. The results showed that the selected algorithm matches the target performance criteria.

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Zhang, Cong. "Fault-tolerant control system design." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/58856.

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This thesis presents several fault/failure-tolerant switching control system structures and proposes design methodologies for systems vulnerable to actuator and sensor faults/failures. The working effectiveness of each actuator/sensor (which is assumed to be known by a fault detection scheme) is represented as a time varying parameter \delta(t). Distinct values/factors are set to \delta(t) in order to model components with different functional status and the number is s. If the total number of components is m, then at any time t, there are s^m fault scenarios. The resulting controller is reconfigurable but with a special structure that the system matrices are fixed while the switching is on the parameter \delta(t). Recognizing that it is unlikely that all components will have serious faults at the same time, the design objective is to maintain an acceptable performance level only for a group of faulty systems imposed by a tolerance measure. At the same time, the no-fault nominal performance is optimized. Several relaxation procedures for the fault/failure-tolerant control are proposed to overcome the combinatorial nature of the problem. Sufficient conditions are derived to guarantee that a matrix inequality, which is a quadratic function of a linear fractional function of a structured matrix \Delta, is satisfied for all \Delta satisfying a set of quadratic matrix equalities and inequalities. This new robustness result extends the S-procedure to a wider setting by tackling structured uncertainties that satisfy constraints other than a norm bound and problems that require quadratic rather than linear inequalities. The extension is given in terms of general matrix products and defines dual variables that are required to satisfy definiteness properties for these products. Weaker commutation and definiteness assumptions for standard and block Hadamard matrix products are derived. We also introduce a new generalized block matrix product and extend the Schur product theorem for this product. The weaker constraints on the dual variables, together with the above fault/failure tolerance measure give significantly less conservative designs than current approaches.

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Zakzouk, Nahla EzzEldin. "Photovoltaic system design and control." Thesis, University of Strathclyde, 2015. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25932.

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Modern industrial society, increasing energy demands, and environmental issues have increased the need for new and clean renewable energy resources, among which photovoltaic energy has gained considerable interest. For best energy utilization, photovoltaic maximum power tracking and grid-integration aspects should be addressed. Generally, variable-step, incremental conductance maximum power point tracking technique has the merits of good tracking accuracy and fast convergence speed. Yet, the division processes in its algorithm create a computational burden. Also the conventional variable step-size encounters steady-state power oscillation and dynamic problems, especially under sudden irradiance changes. In this thesis, a division-free incremental conductance algorithm is proposed for photovoltaic maximum power tracking. It features a modified variable step-size and a direct converter control scheme. The proposed tracking technique does not only have the merits of superior steady-sta te and transient performance but also offers simple implementation and control. Thus, it can be practically implemented using low-cost microcontrollers, reducing overall system cost. Grid integration of photovoltaic systems using power electronic converters that vary in configurations, control loops and mandatory measured signals are investigated. A singlephase two-stage grid-interfaced photovoltaic system is presented in this thesis. It uses a boost chopper in the first stage for maximum power tracking and an H-bridge voltage source inverter in the second stage for grid interfacing. A novel DC-link voltage sensorless control technique is proposed for this topology. It eliminates the inverter outer DC-link voltage control loop, thus reducing system size, cost and control complexity. Additionally, system dynamics are enhanced during sudden changes. Single-stage based grid-tied photovoltaic power converters receive attention due to their merits of reduced footprint and losses, but at the cost of a limited degree-of-freedom. In this thesis, a single-phase single-stage grid-tied photovoltaic system is proposed. It adopts a single transformerless current source inverter to achieve photovoltaic maximum power tacking, whilst satisfying grid interfacing requirements. A proportional-resonant controller, associated with harmonic compensator units, is proposed for the inverter in order to limit injected grid current harmonics. Thus, a lower-sized inductor can be used in the inverter DC-link which enhances efficiency without sacrificing system performance. Simulation and experimental results validate all the proposed systems.

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Tai-Cheng, Yang. "Power system stabilizer design." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245278.

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Ajlouni, Naim. "Genetic algorithms for control system design." Thesis, University of Salford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308088.

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Youssef, Ahmed Medhat Mohamed. "Nonlinear predictive flight control system design." Thesis, University of Strathclyde, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401502.

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Laing, D. Murray. "Integrated process and control system design." Thesis, University of Edinburgh, 1995. http://hdl.handle.net/1842/15187.

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To support concurrent design a framework for hierarchical design of a process operating system is developed. A process operating system is defined as the complete collection of control schemes, alarms and operating procedures used for managing the process through all phases of operation. The design of an integrated operating system is approached by decomposing the problem into a hierarchy of operating tasks. Three classes of operating task are identified: regulatory tasks for optimising operation at a steady state, transition tasks for transferring the process from one regulatory state to another and executive tasks which manage the response to discrete events such as alarms and failures. Operating tasks define the requirements for optimisation and failure management. The implementation of an operating task is achieved by the design of a control scheme for which a generic structure has been developed. The structure emphasises the use of explicit models with parameter estimation and control distribution blocks providing the interface between the abstract model used for optimisation and the reality of the underlying system. A knowledge based representation has been developed to support operating system design. Particular attention has been given to the problem of supporting concurrent design of the process and operating system. A representation has been developed that links process design alternatives with operating system design alternatives by their association with a common operating task. A case study that considers the design of a hierarchical operating system for a hydrofluoric acid plant is included in this thesis. The study demonstrates how the operating system may be developed in step with the process design. The hierarchical development of the process is used to help formulate the operating tasks for the operating system design. Through design of the operating system it is possible to provide focused feedback on the process operability requirements. The final operating system structure demonstrates how failure management and optimisation are integrated together.

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Tebbutt, Colin Dean. "Control system design using artificial intelligence." Doctoral thesis, University of Cape Town, 1991. http://hdl.handle.net/11427/14697.

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Includes bibliography.
Successful multivariable control system design demands knowledge, skill and creativity of the designer. The goal of the research described in this dissertation was to investigate, implement, and evaluate methods by which artificial intelligence techniques, in a broad sense, may be used in a design system to assist the user. An intelligent, interactive, control system design tool has been developed to fulfil this aim. The design tool comprises two main components; an expert system on the upper level, and a powerful CACSD package on the lower level. The expert system has been constructed to assist and guide the designer in using the facilities provided by the underlying CACSD package. Unlike other expert systems, the user is also aided in formulating and refining a comprehensive and achievable design specification, and in dealing with conflicts which may arise within this specification. The assistance is aimed at both novice and experienced designers. The CACSD package includes a synthesis program which attempts to find a controller that satisfies the design specification. The synthesis program is based upon a recent factorization theory approach, where the linear multivariable control system design problem is translated into, and techniques efficiency solved as, a quadratic programming problem, which significantly improve the time and space of this method have been developed, making it practical to solve substantial multivariable design problems using only a microcomputer. The design system has been used by students at the University of Cape Town. Designs produced using the expert system tool are compared against those produced using classical design methods.

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Li, Pok Ho Michael. "Graphical system input for computer aided control system design." Thesis, University of Salford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305963.

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Suc, Vincent. "Design of a portable observatory control system." Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/663912.

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In this thesis, we synthesize the development of a new concept of operation of small robotic telescopes operated over the Internet. Our design includes a set of improvements in control algorithmic and hardware of several critical points of the list of subsystems necessary to obtain suitable data from a telescope. We can synthesize the principal contributions of this thesis into five independent innovations: - An advanced drive closed-loop control: We designed an innovative hardware and software solution for controlling a telescope position at high precision and high robustness. - A complete Telescope Control System (TCS): We implemented a light and portable software using advanced astronomical algorithms libraries for optimally compute in real-time the telescope positioning. This software also provides a new multiple simultaneous pointing models system using state machines which allows reaching higher pointing precision and longer exposure times with external guiding telescopes. - A distributed software architecture (CoolObs): CoolObs is the implementation of a ZeroC-ICE framework allowing the control, interaction, and communication of all the peripherals present in an astronomical observatory. - A patented system for dynamic collimation of optics: SAPACAN is a mechanical parallel arrangement and its associated software used for active compensation of low-frequency aberration variations in small telescopes. - Collimation estimation algorithms: A sensor-less AO algorithm have been applied by the analysis of images obtained with the field camera. This algorithm can detect effects of lousy collimation. The measured misalignments can later feed corrections to a device like SAPACAN. Due to the constant presence of new technologies in the field of astronomy, it had been one of the first fields to introduce material which was not democratized at this time such as Coupled Charged Devices, internet, adaptive optics, remote and robotic control of devices. However, every time one of these new technologies was included in the field it was necessary to design software protocol according to the epoch’s state of the art software. Then with the democratization of the same devices, years after the definition of their protocols, the same communication rules tend to be used to keep backward compatibility with old - and progressively unused- devices. When using lots of cumulated software knowledge such as with robotic observing, we can dig in several nonsenses in the commonly used architectures due to the previously explained reasons. The described situation is the reason why we will propose as follows a new concept of considering an observatory as an entity and not a separated list of independent peripherals. We will describe the application of this concept in the field or robotic telescopes and implement it in various completely different examples to show its versatility and robustness. First of all, we will give a short introduction of the astronomical concepts which will be used all along the document, in a second part, we will expose a state of the art of the current solutions used in the different subsystems of an observing facility and explain why they fail in being used in small telescopes. The principal section will be dedicated to detail and explain each of the five innovations enumerated previously, and finally, we will present the fabrication and integration of these solutions. We will show here how the joint use of all of them allowed obtaining satisfactory outstanding results in the robotic use of a new prototype and on the adaptation on several existing refurbished telescopes. Finally, we dedicate the last chapter of this thesis to resuming the conclusions of our work.
En esta tesis, presentamos el desarrollo de un nuevo concepto de operación de telescopio robótica operados a través de Internet. Nuestro diseño incluye un conjunto de mejoras de los algoritmos de control y hardware de varios puntos críticos de la lista de subsistemas necesarios para obtener datos de calidad científica con un telescopio. Podemos sintetizar las principales contribuciones de esta tesis en cinco innovaciones independientes: - Un control de motor avanzado en bucle cerrado: Diseñamos un hardware y software innovadores para controlar la posición y movimiento fino de un telescopio con alta precisión y alta robustez. - Un software de control de telescopio (TCS) integrado: Implementamos un software ligero y portátil que ocupa bibliotecas de algoritmos astronómicos avanzados para calcular de manera óptima y en tiempo real la posición teórica del telescopio. Este software también proporciona un software innovador de modelo de pointing múltiples simultáneos. Esto permite alcanzar una mayor precisión de seguimiento y así ocupar tiempos de integración más importante ocupando un telescopio de guía mecánicamente apartado al telescopio principal. - Una arquitectura de software distribuido (CoolObs): CoolObs es una implementación de software ocupando la plataforma de desarrollo ZeroC-ICE la cual permite el control, la interacción y la comunicación de todos los periféricos presentes en un observatorio astronómico. - Un sistema patentado para la colimación dinámica de la óptica: SAPACAN es un sistema mecánico de movimiento paralelo y su software asociado. Se puede ocupar para compensar activamente las aberraciones ópticas de bajo orden en pequeños telescopios. - Algoritmos de estimación de colimación: Se desarrolló un algoritmo de óptica adaptiva sin sensor en base al análisis de imágenes obtenidas con una cámara cerca del plano focal del telescopio. Este algoritmo puede detectar efectos de mala colimación de las ópticas. Los desajustes, una vez medidos, pueden posteriormente ser aplicados como correcciones a un dispositivo como SAPACAN. Astronomía es un terreno propicio al desarrollo de nuevas tecnologías y, debido a esto, los protocolos de comunicación entre periféricos pueden ser obsoletos porque se han escritos en etapas tempranas de existencia de estas nuevas tecnologías. Las mejoras se han hecho de a poco para mantener la compatibilidad de los sistemas ya existentes, ocupando un planteamiento general de la problemática de control de telescopios robóticos, proponemos un nuevo concepto de observatorio robótico visto como una entidad y no una lista de periféricos independientes. A lo largo de esta tesis, describiremos la aplicación de este concepto en el campo de telescopios robóticos e implementarlo en varios sistemas independientes y variados para mostrar la versatilidad y robustez de la propuesta.

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Bideci, Suleyman. "Control System Design For A Haptic Device." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608837/index.pdf.

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In this thesis, development of a control system is aimed for a 1 DOF haptic device, namely Haptic Box. Besides, it is also constructed. Haptic devices are the manipulators that reflect the interaction forces with virtual or remote environments to its users. In order to reflect stiffness, damping and inertial forces on a haptic device position, velocity and acceleration measurements are required. The only motion sensor in the system is an incremental optical encoder attached to the back of the DC motor. The encoder is a good position sensor but velocity and acceleration estimations from discrete position and time data is a challenging work. To estimate velocity and acceleration some methods in the literature are employed on the Haptic Box and it is concluded that Kalman filtering gives the best results. After the velocity and acceleration estimations are acquired haptic control algorithms are tried experimentally. Finally, a virtual environment application is presented.

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Loh, A. P. "Uncertainty estimation and multivariable control system design." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375267.

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Abu-Alola, Abdulmohsin. "Genetic algorithms for intelligent control system design." Thesis, University of Wolverhampton, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282507.

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Playter, Robert R. (Robert Randall). "Control system design using H [infinity] optimization." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/34997.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
The bracketed word appears as the mathematical infinity symbol on the title page.
Includes bibliographical references.
by Robert Playter.
M.S.

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Syska, Birga. "Structured approach to industrial control system design." Thesis, University of South Wales, 2004. https://pure.southwales.ac.uk/en/studentthesis/structured-approach-to-industrial-control-system-design(ab2763bb-83f8-433a-a0ec-c2384eca7708).html.

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The design of complex control systems for industrial processes is in general still based on experience and trial and error rather than on systematic process analysis and control system design. Typically control systems in the process industry comprise either single PID control loops with clear association of the process input and controlled signal or standard control schemes developed by intuition through the years (e.g. cascade control using an underlying flow control loop). Although many of these control schemes seem to work rather satisfactorily, in most major control systems several poorly tuned or switched off controllers are encountered leading to unsatisfactory process behaviour or manual operation of the process. The subject of this work is the development of a structured approach to industrial control system design which makes the potential of systematic process analysis and controller design methods developed by control theory available for industrial users with limited control experience. This aspect has been addressed within the collaboration research project between the University of Glamorgan and the Fachhochschule Hannover, of which the work presented in this thesis is a substantial part. Therefore, the ICACSD (Industrial Computer Aided Control System Design) scheme has been developed to allow the design of PID based control structures for nonlinear single- and multivariable processes that are as simple as possible and as good as required. Beyond this an industrial standardised controller design procedure for nonlinear and multivariable processes has been elaborated. For the validation of the proposed approach, a prototype control system design tool has been programmed, which can be integrated into the ICACSD scheme using a blockoriented simulation environment. The approach for industrial control system design presented shows the benefits of applying advanced control system design methods which are usable by industrial users when provided with an intuitive and usable graphical user interface. In order to validate the work the proposed control design procedure has been made accessible in the form of a software prototype with an economically designed graphical user interface allowing easy application of the developed methods. The prototype realisation for the Industrial Computer Aided Control (ICAC) toolbox supplies the new structured approach to control system design for industrial processes within a block-oriented simulation environment.

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Egilmez, Gokhan. "Stochastic Cellular Manufacturing System Design and Control." Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1354351909.

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Chan, Ka Yeung. "Reconfigurable control system design for mass customization /." View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?IEEM%202002%20CHAN.

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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2002.
Includes bibliographical references (leaves 111-112). Also available in electronic version. Access restricted to campus users.

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Showchaiya, Natthaphon. "Inferential Control System Design for Distillation Process." 京都大学 (Kyoto University), 2002. http://hdl.handle.net/2433/149792.

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Maskey, Anuj. "Battery energy storage system control algorithm design." Thesis, Maskey, Anuj (2019) Battery energy storage system control algorithm design. Honours thesis, Murdoch University, 2019. https://researchrepository.murdoch.edu.au/id/eprint/52653/.

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Microgrid is based on smaller decentralised low voltage system with the use of modern power technology puts different types of Distributed Energy sources solar power, wind power, and energy storage devices together, improving the electrical supply reliability, reducing the feeder loss and ensures the stability of the voltage. The current trend of incorporating energy storage devices in the microgrid is aimed to mitigate the power imbalance and improve the electrical supply reliability. The thesis uses Kalbarri, Western Australia as a case study site with an aim to investigate the appropriate battery technology and formulate control algorithm for the microgrid. The thesis starts by examining the Australian electrical market including the: socio‐economic, political, and regulatory environment and presents the rationale of having an Energy Storage System in rural Australia. The thesis investigates the various available BESS battery technology options and suggests the most appropriate options for the BESS comprised Kalbarri microgrid model. The MATLAB/Simulink BESS control algorithm design model is presented with an aim to test voltage and frequency regulation under different load condition, including the process of seamless transition from the grid‐connected operation to a grid‐disconnected operation of the microgrid. The research presents a theoretical control model based on the Power Control theory and existing academic literature on the topic. The thesis examines the control algorithm design to regulate the frequency and voltage using the BESS system to connect to the main three phase AC grid. The overall site model includes a power conversion of two DC sources: BESS and PV system. The BESS control algorithm model comprises of a Power Conversion system that use three‐phase full bridge Insulated Gate Bipolar Transistors (IGBTs) with LCL filter and a Power Control System based on Phased Lock Loop to synchronise with the grid frequency. The Power Control system uses a three‐phase sinusoidal abc frame conversion to a DC reference signal dq0 frame to incorporate PI controller with an aim that the intermittence of the renewable energy generation Wind and PV system can be maintained to a balanced state in the grid within a short frame of time. The BESS control algorithm model uses a Current Controlled Voltage Source Converter for its simple controller design, better performance during grid fault and the overall cost saving of the system. The thesis simulation utilized CCVSC for its tight regulation of the line current, mainly VSC protection against overcurrent and a high accuracy instantaneous current control. However, the author acknowledges the simulation result indicate an anomaly with voltage control while using CCVSC in the control algorithm model in power source transition test condition. Hence, as a part of future improvement with a focus on the overcurrent, the author concludes possible testing with the VCVSC based control algorithm model for rapid and continuous response for smooth dynamic control and automated P and Q power control in both steady‐state and dynamic system conditions. Finally, the impact on the microgrid is presented with an in‐depth analysis of the results, including the achievements, innovations, challenges and the suggestion for future improvement in the discussion section of the report.

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Jamoom, Michael Brian 1975. "Constrained optimization for hierarchical control system design." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/50071.

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Al, Swailem Salah I. "Application of robust control in unmanned vehicle flight control system design." Thesis, Cranfield University, 2004. http://hdl.handle.net/1826/136.

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The robust loop-shaping control methodology is applied in the flight control system design of the Cranfield A3 Observer unmanned, unstable, catapult launched air vehicle. Detailed linear models for the full operational flight envelope of the air vehicle are developed. The nominal and worst-case models are determined using the v-gap metric. The effect of neglecting subsystems such as actuators and/or computation delays on modelling uncertainty is determined using the v-gap metric and shown to be significant. Detailed designs for the longitudinal, lateral, and the combined full dynamics TDF controllers were carried out. The Hanus command signal conditioning technique is also implemented to overcome actuator saturation and windup. The robust control system is then successfully evaluated in the high fidelity 6DOF non-linear simulation to assess its capability of launch stabilization in extreme cross-wind conditions, control effectiveness in climb, and navigation precision through the prescribed 3D flight path in level cruise. Robust performance and stability of the single-point non-scheduled control law is also demonstrated throughout the full operational flight envelope the air vehicle is capable of and for all flight phases and beyond, to severe launch conditions, such as 33knots crosswind and exaggerated CG shifts. The robust TDF control law is finally compared with the classical PMC law where the actual number of variables to be manipulated manually in the design process are shown to be much less, due to the scheduling process elimination, although the size of the final controller was much higher. The robust control law performance superiority is demonstrated in the non-linear simulation for the full flight envelope and in extreme flight conditions.

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Salam, Md Abdul, and Md Mafizul Islam. "Modelling and Control System Design to control Water temperature in Heat Pump." Thesis, Karlstads universitet, Avdelningen för fysik och elektroteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-30680.

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The thesis has been conducted at Hetvägg AB and the aim is to develop a combined PID and Model Predictive Controller (MPC) controller for an air to water heat pump system that supplies domestic hot water (DHW) to the users. The current control system is PLC based but because of its big size and expensive maintenance it must be replaced with a robust controller for the heat pump. The main goal of this project has been to find a suitable improvement strategy. By constructing a model of the system, the control system has been evaluated. First a model of the system is derived using system identification techniques in Matlab-Simulink; since the system is nonlinear and dynamic a model of the system is needed before the controller is implemented. The data has been estimated and validated for the final selection of the model in system identification toolbox and then the controller is designed for the selected model. The combined PID and MPC controller utilizes the obtained model to predict the future behavior of the system and by changing the constraints an optimal control of the system is achieved. In this thesis work, first the PID and MPC controller are evaluated and their results are compared using transient and frequency response plots. It is seen that the MPC obtained better control action than the PID controller, after some tuning the MPC controller is capable of maintaining the outlet water temperature to the reference or set point value. Both the controllers are combined to remove the minor instabilities from the system and also to obtain a better output. From the transient response behavior it is seen that the combined MPC and PID controller delivered good output response with minimal overshoot, rise time and settling time.

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Cimen, Hasan. "Decentralised power system load frequency controller design." Thesis, University of Sussex, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244317.

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Fitzsimons, Philip Matthew. "Design of a helicopter automatic flight control system using adaptive control." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/16641.

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Martin, Richard James. "Multivariable control system design for a submarine using active roll control." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/10945/21456.

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Barenthin, Märta. "On input design in system identification for control." Licentiate thesis, KTH, School of Electrical Engineering (EES), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4000.

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There are many aspects to consider when designing system identification experiments in control applications. Input design is one important issue. This thesis considers input design both for identification of linear time-invariant models and for stability validation.

Models obtained from system identification experiments are uncertain due to noise present in measurements. The input spectrum can be used to shape the model quality. A key tool in input design is to introduce a linear parametrization of the spectrum. With this parametrization a number of optimal input design problems can be formulated as convex optimization programs. An Achilles' heel in input design is that the solution depends on the system itself, and this problem can be handled by iterative procedures where the input design is based on a model of the system. Benefits of optimal input design are quantified for typical industrial applications. The result shows that the experiment time can be substantially shortened and that the input power can be reduced.

Another contribution of the thesis is a procedure where input design is connected to robust control. For a certain system structure with uncertain parameters, it is shown that the existence of a feedback controller that guarantees a given performance specification can be formulated as a convex optimization program. Furthermore, a method for input design for multivariable systems is proposed. The constraint on the model quality is transformed to a linear matrix inequality using a separation of graphs theorem. The result indicates that in order to obtain a model suitable for control design, it is important to increase the power of the input in the low-gain direction of the system relative to the power in the high-gain direction.

A critical issue when validating closed-loop stability is to obtain an accurate estimate of the maximum gain of the system. This problem boils down to finding the input signal that maximizes the gain. Procedures for gain estimation of nonlinear systems are proposed and compared. One approach uses a model of the system to design the optimal input. In other approaches, no model is required, and the system itself determines the optimal input sequence in repeated experiments.

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M, Venkata Raghu Chaitanya. "Model Based Aircraft Control System Design and Simulation." Thesis, Linköping University, Linköping University, Department of Management and Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19264.

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Development of modern aircraft has become more and more expensive and time consuming. In order to minimize the development cost, an improvement of the conceptual design phase is needed. The desired goal of the project is to enhance the functionality of an in house produced framework conducted at the department of machine design, consisting of parametric models representing a large variety of aircraft concepts.

The first part of the work consists of the construction of geometric aircraft control surfaces such as flaps, aileron, rudder and elevator parametrically in CATIA V5.

The second part of the work involves designing and simulating an Inverse dynamic model in Dymola software.

An Excel interface has been developed between CATIA and Dymola. Parameters can be varied in the interface as per user specification; these values are sent to CATIA or Dymola and vice versa. The constructed concept model of control surfaces has been tested for different aircraft shapes and layout. The simulation has been done in Dymola for the control surfaces.

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Faanes, Audun. "Controllability analysis for process and control system design." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Natural Sciences and Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-35.

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Controllability is the ability of a process to achieve acceptable performance, and in this thesis we use controllability analysis in the design of buffer tanks, feedforward controllers, and multivariable controllers such as model predictive control (MPC).

There is still an increasing pressure on the process industry, both from competitors (prize and quality) and the society (safety and pollution), and one important contribution is a smooth and stable production. Thus, it is important to dampen the effect of uncontrolled variations (disturbances) that the process may experience.

The process itself often dampens high-frequency disturbances, and feedback controllers are installed to handle the low-frequency part of the disturbances, including at steady state if integral action is applied. However, there may be an intermediate frequency range where neither of these two dampens the disturbances sufficiently. In the first part of this thesis we present methods for the design of buffer tanks based on this idea. Both mixing tanks for quality disturbances and surge tanks with “slow” level control for flow-rate variations are addressed.

Neutralization is usually performed in one or several mixing tanks, and we give recommendations for tank sizes and the number of tanks. With local PI or PID control, we recommend equal tanks, and give a simple formula for the total volume. We also give recommendations for design of buffer tanks for other types of processes. We propose first to determine the required transfer function to achieve the required performance, and thereafter to find a physical realization of this transfer function.

Alternatively, if measurements of the disturbances are available, one may apply feedforward control to handle the intermediate frequency range. Feedforward control is based mainly on a model, and we study the effect of model errors on the performance. We define feedforward sensitivities. For some model classes we provide rules for when the feedforward controller is effective, and we also design robust controllers such as μ -optimal feedforward controllers.

Multivariable controllers, such as model predictive control (MPC), may use both feedforward and feedback control, and the differences between these two also manifest themselves in a multivariable controller. We use the class of serial processes to gain insight into how a multivariable controller works. For one specific MPC we develop a state space formulation of the controller and its state estimator under the assumption that no constraints are active. Thus, for example the gains of each channel of the MPC (from measurements to the control inputs) can be found, which gives further insight into to the controller. Both a neutralization process example and an experiment are used to illustrate the ideas.

Paper 4 reprinted with kind permission of the Research Council of Norway Paper 8 reprinted with kind permission of Elsevier Publishing, http://www.sciencedirect.com

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30

Li, Lin. "Intelligent laser cladding control system design and construction." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/7683.

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31

Barenthin, Märta. "On input design in system identification for control /." Stockholm : Automatic control, School of Electrical Engineering, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4000.

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32

Liu, Shuo 1977. "Design of a real-time process control system." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80127.

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This thesis presents the whole real-time decoupling control system design procedures for the water level and temperature control of the Feedback experimental process testbed Procon 38-003 using RT-Lab computer control system. First, the thesis describes the configuration of the system under study. Two approaches of modeling a shell-tube heat exchanger and a method to analyze a water tank system are presented with the linearization method applied on the derived MIMO process model. The control methods attempted on the plant are decoupling control scheme using Decoupling Network and Relative Gain Array pairing method. Applications and feasibility of the attempted control schemes are discussed. Then, description of, the utilized hardware and software in the control system is presented. The emphasis is on the RT-Lab system, which acts as the core component in the whole system, and the signal converters, which are designed and implemented. Development and setup of the RT-Lab model is depicted in the sixth chapter. Merits and limitations of the designed control system are presented in the conclusion of this thesis through experimental records and written work.

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33

Boyle, Jean-Marc. "Knowledge-based techniques for multivariable control system design." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329990.

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Phaal, P. "An object-oriented environment for control system design." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382274.

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35

CHEN, JUN-WU, and 陳君武. "Decoupling control system design." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/10356703925673325692.

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36

Chang, Syu-cheng, and 張旭呈. "iExoskeleton: Control System Design." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/68750638098334013130.

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碩士
國立雲林科技大學
機械工程系碩士班
101
The exoskeleton was developed to assist the elderly in keeping their walking function, by actuating pneumatic muscles with user’s gait feedback. Thin-film pressure sensors were applied to feedback foot pressures and identify walking gait of the user. A controller interpreted the gait by those input foot pressures and send out corresponding actuating signals to pneumatic muscles. As with aid in getting up from a chair, the system provides also aids in walking on a flat surface, up and down stairs. Thin-film pressure sensors, two for each foot, were buried under heel and metatarsal regions. Experiments confirmed that the foot pressure signals provided could actually inspire the expected actuations of pneumatic muscles and help the walking function. Without attaching sensors to the human body, the proposed scheme is more convenient and comfortable when comparing to the case with a need of sensor attachments. Keyword: exoskeleton control, film-type pressure sensors, gait analysis

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37

XU, CHEN-JIAN, and 許陳鑑. "Design of an expert system for control system design." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/45138180864663041156.

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38

HONG, YU-CHENG, and 洪裕成. "An expert system for control system design." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/10755992732356613803.

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Chen, Jen-Yang, and 陳珍源. "Adaptive Fuzzy Control System Design." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/41837319997903382326.

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博士
淡江大學
電機工程學系
88
This dissertation focuses on the design of the following two intelligent controllers: fuzzy controller and extension controller. For the fuzzy controller, three parameters including control rules, membership functions, and scaling factor are well distinct adapted using adaptation approach. A new rule analytical form with multi-variables is proposed such that the direct and indirect adaptation approaches can be successfully applied to high order systems. A fuzzy sliding mode controller via rule adaptation is also shown in the contents. Such structure of fuzzy controller is usually easier than that of using state variables, because the fuzzy sliding mode controller contains less input variables. Regarding to the membership functions adaptation, only one parameter is used to adapt the membership functions. After adaptation, the membership functions are always equally distributed over the universe of discourse. Here, we focus on the design of direct and indirect fuzzy sliding mode controllers. For the scaling factor adaptation, two popular types, Mamdani and Takagi-Sugeno fuzzy controllers, are investigated. Of course, the best advantage of scaling factor is that the remaining parameters of fuzzy controller including rules and membership functions do not need to change under control, we can determine it under control common sense. Combination of the Mamdani and the Takagi-Sugeno models in designing the indirect fuzzy control via scaling factor adaptation is also studied. Two robust control terms, bang-bang control and hitting control, are illustrated in order to guarantee the stability of developed fuzzy control systems. For the extension controller, based on the scheme of adaptive and sliding mode control, two distinct extension controllers are investigated. Some simulation works of nonlinear control system for the developed controllers are given. As to what we expect, the simulation results show the effectiveness of the developed controllers.

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Su, Zi-Roun, and 蘇子榮. "Automatic Remote-Control System Design." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/83966746187089425558.

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碩士
國立中山大學
電機工程學系研究所
89
ABSTRACT: With the progress of science development, the controls of various loads come into computerize gradually. Most of equipment makes use of programmable Logic Controller or Ethernet network in the past, which connect with computer. It is mature in industrial applications, but still unsuitable in the general monitoring system . The project focuses on this problem to provide a complete solution. The fundamental structure of system runs in the environment of popular windows by personal computer, using high-level interface program between human being and machine. The operator can be easy to operate system by using high-level interface program language. It makes use of series-port output and input signals via cable to specific module, and supplies interface program between human and machine. Consequently, remote equipment can be controlled to achieve expected purpose.

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Huang, Bing-Chyi, and 黃柄圻. "Adaptive Fuzzy Control System Design." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/26985233531754948858.

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碩士
淡江大學
電機工程學系
85
To control various nonlinear systems, the fazzy controller is the most popular metho recently. However, the designs of fuzzy systems depend on knowledge acquisition by experience of domain experts and adjust rule base and membership function by design engineers. The method will spend much time and the performance of the controlled system can not be guaranteed to achieve optimal result. Therefore, we propose direct adaptive fuzzy control system and indirect adaptive fuzzy control system to improve the disadvantages of traditional fuzzy system. Simply speaking, the designed method of direct adaptive fuzzy control system generates a control command from the single fuzzy controller, then feed it back the plant. The designed method of indirect adaptive fuzzy control system is modeling the plant from a number of fuzzy systems at first, then it generates a control command by the dynamic character which will feed it back the plant. Whatever which types of adaptive fuzzy controller, they have the adaptive law of center regulation or rule regulation on line, respectively. The adaptive law not only can overcome the defect of genetic algorithms and simulated annealing which are unable to find the optimal membership function and rule base on line, but also the results of the controlled system will not be influenced, even the plant has many uncertainties, such as the suddenly change of parameters or the external disturbance. Further, we use a few parameter to design the adaptive law in order to reduce the complex of mathematical deduction and increase the speed of computing. Therefore, the fuzzy system becomes more practical and robust.

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Chang, Chien-Ta, and 張建達. "Wind Power Control System Design." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/43547913153453291165.

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碩士
國立高雄應用科技大學
電機工程系博碩士班
96
This thesis aims to integration design of wind power control systems.The system combines the vertical-axis rotor permanent magnet synchronous generators, three-phase rectifier circuit DC to DC switching converters, lifting pressure switch,energy storage devices, DC to DC converters. Through the power conversion, the wind power will be stored in the battery for DC load . The thesie uses the latest wave of DC and pulse width modulation (PWM), to improve the efficiency of energy conversion. For the protection of wind turbine generators and power conversion control devices, remote monitoring network is used to monitoring the wind turbine operating system. This increase the safety of operations. With the load monitoring system, the wind generator output and the wind turbine can be observed.

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Chao, Yu-Chih, and 趙育志. "Antisense Control Sequences Design System." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/33297523983898899738.

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碩士
國立臺灣大學
資訊工程學研究所
90
Antisense oligonucleotides have been widely applied for controlling gene expression at the post-transcriptional level. It may also develop into a new approach for treating various diseases. The control oligonucleotides play an important role in the antisense related experiments. However, there has never been a computer system, which can automatically generate sequences of control oligonucleotides. Researchers usually manually select the control sequences, so the selecting process is always time consuming, labor intensive, and is not very appropriate since it may induces undesirable hybridization or other unexpected effects to the target organisms. The system proposed in this paper generates candidates of control sequences according to users’ input antisense sequences. It employs several formulas for calculating melting temperatures. It also uses several hybridization related criteria to evaluate the candidates and to assist the researchers to select the most suitable control oligonucleotide sequence.

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Cheng, Tsung-Ting, and 鄭宗庭. "Industrial PID Control System Design." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/3kyv3r.

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碩士
國立高雄應用科技大學
電機工程系博碩士班
106
In the program control of the oil tank, the PID is widely used, such as high pressure troughs, atmospheric trenches, etc., and the reason for such popularity is that such controllers are of a generic type and are suitable for a variety of different operating procedures by the mode of the manipulator. At present, there are many PID controllers in the industry. In different environments, the PID parameters are different. In the PID-driven control valve, the widely used temperature control, pressure control. In this paper, we try to use the Ziegler-Nichols rule to calculate the controller parameters by simulating the PID parameters and passing the Ziegler-Nichols rule of thumb. Then use the Ziegler-Nichols rule to calculate the controller parameters to compare with them to find out the most suitable for this experiment In the PID parameter settings. In this paper, the optimal value is K_p=0.8, K_i=0.25, K_d=0.05 by Ziegler-Nichols' rule.Compared with other set values, the operation of the machine is stabilized and the production is improved. effectiveness. Through this study can make the future in the adjustment of PID control, to better understand the needs of customers, not only to ensure the stability of the controller obtained, but also can effectively improve the efficiency of the algorithm, but also make the controller performance More excellent, more robust control performance.

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Wang, Jiun-yaw, and 王俊堯. "System Model Estimation and Predictive Control in Control System Design Applications." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/32720270282959463526.

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博士
國立臺灣科技大學
電機工程系
96
The purpose of predictive theorem is to estimate system model and estimate future system response. On the control system design area, if system variation can be predicted earlier, then future system dynamics can be predict. This will do great benefit to the reliability and control performance of system. The purpose of this paper is to combine system model estimation and predictive control system design, and apply it to shear machine synchronize control, rotated inverted pendulum control and wheel robot balance control. Experimental and simulated results show that the combination of system model estimation and predictive control system can improve controller performance. For example, it can improve rotated inverted pendulum system stability, reduce wheel robot vibration and reduce shear machine overshoot and reduce delay time.

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WENG, TING-CHING, and 翁頂清. "Optimal Control System Design for Fuel Processing System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/04152012946279247192.

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碩士
大葉大學
電機工程學系
96
This paper presents that an optimal control system which consists of both feedforward and state-feedback controllers is designed using a well-developed linear quadratic Gaussian and loop transfer recovery (LQG/LTR) method for a fuel processing system (FPS).This FPS uses natural gas as fuel and reacts with atmospheric air through a catalytic partial oxidation (CPO)，after pure supply to proton exchange membrane fuel cell (PEMFC) stack . The objectives of this paper are to use the Matlab/Simulink software tool to model such an optimal control system and to analyze the system performance. The proposed method achieves better performance and robustness properties in both time-domain and frequency-domain responses.

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47

Isaac, Raymond. "An expert system for distillation control system design." 1994. http://catalog.hathitrust.org/api/volumes/oclc/33025936.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1994.
Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 161-163).

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48

Jiann, Min Wu. "Model Reference Optimal Control System Design." 1993. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0009-0112200611351437.

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49

Wang, Yung-chun, and 王永俊. "Design of Embedded Speech Control System." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/40625111375319202865.

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碩士
國立中正大學
資訊工程所
93
Along with the technical development in computer and electronics, home appliances have become smarter and had increasingly more controllable features. Therefore the remote controller for these appliances usually have more buttons; and since many appliances use a remote controller, there will be many more buttons in a house. So, people might need an embedded speech control system to replace the controllers and many buttons. To make the engine Chinese recognizable, a Chinese speech corpus and a Chinese phonetic alphabet are used to train the recognition engine, and we found that the database size increases exponentially with the number of recognizable phones. In addition, we also found that a bottleneck in performance occurs due to the Fast Fourier Transform (FFT) in the feature extraction. Therefore, we analyze the storage capacity and performance of the speech recognition procedure. The most important thing in speeding up the process of the speech recognition is not to affect the accuracy and the recognition rate. In this research, we have found that by using DSP to improve the FFT, we can raise the performance of the feature extraction by tenfold without affecting the accuracy of the system. But on the other way, the recognition is not a compute-intensive operation. It is difficult to speed up by the DSP. So, we propose a practical architecture which has features of unlimit storage capacity, speaker-independence, and fast reaction.

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LAI, JING-XUN, and 賴菁勳. "Time delay system adaptive control design." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/61205535919000690295.

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Dissertations / Theses on the topic 'Subjective control system design'

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